Rotary duplicator



May 21, 1935.

L. KLUITMANN ROTARY DUPLICATOR Filed Jan. 17, 1935 2 Sheets-Sheet 1 P mo a PM l K o e L y 1935. 1.. KLUITMANN 2,002,321

I ROTARY DUPLIGATOR Filed Jan. 17, 1935 2 Sheets-Sheet 2 Inventor:

Patented May-21, 1935 I v Q UNITED STATES PATENT OFFICE Leo Kluitmann,Dusseldorf, Germany.

Application January 17, 1935, Serial No. 2,185 In Germany August 10,1931

'5 Claims. (Cl. 101132) This invention relates to a device for printingThe rack carries on its toothed part a rider 2 on sheets. which isadjustable in the longitudinal direction It has been proposed already tochange the of the rack I. The rear end of the rack is conform induplicating machines automatically nected with the end of a spring 5which in the 5 without stopping the machine by actuating a representedembodiment is a spiral plate spring 5 lever, etc. for moving the formresting on a feedor drum spring as it is used in type-writing maingtable towards the printing drum to bring it chines and which has theadvantage that it may within ranges of a gripping device secured to thebe widely extended and needs only a minimum of drum. By means of a cam,a lever arm arranged space. The spring 9 is mounted on a pin or screw 10on the printing drum is controlled to open the bolt 3| secured to abracket 30 of the machine 10 gripping device during the same operation,so frame. At each rotation of the printing drum 2| that the previouslyfixed form drops out and the the rack is displaced step by step bythetooth new form is held on the drum after the lever arm 3 rotatingwith the drum 2| and engaging each has passed the cam. time the toothedpart of the rack. The pawl 4 According to the invention, the control ofthe pivotally mounted on the machine frame holds 15 device for changingthe form is to be efiected the rack I in the position attained by meansof automatically after a certain number of copies the tooth 3 againstthe pull of the spring 9. A have been made. It isknown to print'a plateor control lever 5 is pivotally mounted on a pin ll stencil inaddressing machines several times and in the side wall |3 of the machineframe and prothen to change it automatically, but these known vided witha sprin 1 at its e e the Said 20 devices are, as a rule, required toreprint only a, spring being secured at 36 to the machine frame. verylimited number of addresses and are not Near the said end of the lever 5a pin 5a is arsuited for duplicators, in which the form has to beranged. A stop lever'G pivotally mounted on the changed only after alarger number of copies has machine frame and provided with a nose 6a isbeen printed, which fluctuates considerably. held in engagement with thepin 5a of the con- 25 Furthermore, the changing of paper forms in trollever 5 and against an abutment pin 3'! of duplicators differsessentially from changing the machine frame by means of a spring l2sestencils in addressing machines. cured at 29 to the machine frame. Thelower According to the invention, the change is efend of the said stoplever lies in the path of the 30 fected by means of arack which at eachrotation rider 2 of the rack I. After the drum 2| has 30 f the printingdrum is moved by a tooth romade the number of revolutions fixed by theadtating with the drum. This is continued until justment of the rider 2the latter abuts the stop a rider adjusted on the rack moves a two-armedlever 6 and moves the same about its pivot 38, 'stop lever securing aspring-urged second lever so that the nose 6a of the stop lever Breleases the for the automatic change of the original out of pin 5a ofthe lever 5 and the spring '1 moves the 35 normal position and thusreleases the automatic latter about its pivot l4. Change O the original.The rack then automati- .The control lever 5 is connected by a pin 23cally returns to initial position, and the lever for with a slide 25.The slide 25 is'embedded in a releasing the change of the original isreturned guide or carriage 24 connected with the side wall 40 tosecuring position. This is effected by a control I3 and carries a camdisc 28 which is lifted when 40 cam rotating with the drum and a slideroll which the lever 5 is swung out whereby at the rotation bring thelever controlling the change of the orig- .of the drum 2| a lever arm 21is raised. The inal back to operating position, whereupon after leverarm 21 is positioned on a shaft 22 in the engagement of the lockingmechanism the stop drum 2|, which carries the grippers 28 for holdinglever controlled by the rider is secured by a theform. Owing to thisoperation, the grippers p in 28 extending through the circumference ofthe By way of example, the-invention is illustrated drum are opened, theform hitherto fixed on the in one embodiment inthe accompanying drawdrum2| isthus released after the grippers 28 ings, in which Figure 1 is aside view of the device; have passed the lowermost point of the drum 2|Fig. 2, a section of Fig." 1 with the toothed disc and drops onto adelivery table 35 which is ar- 50 removed shortly before the pressingback of the ranged on the machine frame. hand lever; and Fig. 3,'apartial top view. The new form which .is to be clamped is laid Referringto the drawings, a. rack I is slidably, upon a feeding table 20 which ispivotally supmounted in its longitudinal direction in guides ported by arod 32, which in its turn is pivotally I8 which are secured to themachine frame I3. mounted at 34 on the machine frame, and furtherSimultaneously with the motion of the lever 5 the pin it is lowered,whereby the front portion of the table 20 is moved by the springs ittowards the drum 2 I. In the meantime, the drum 2| has continued torotate, so that the grippers 28 ex tending over the circumferencethereof in opening position have slipped under the front edge of theform to be fixed on the circumference of the drum 2i. The table 26, bymeans of the pins li arranged on the drum 2i and the noses l 6, is thendrawn in the direction ofrotation of the drum 2i until the openedgrippers 28, owing to the sliding ofi of the lever arm 21 from the camdisc 26, close again and thus fix or hold the form positioned withinrange of the grippers 23.

When the lever 5 is drawn by the spring i, the pawl t is lifted out ofrange of the teeth of the rack i by a rod 8 pivotally connected with thelever 5 and the pawl 6. The released rack l is then returned to initialposition by the spring a. After the spring I has acted upon the lever 5the eccentrically disposed disc it which in normal. position of thelever 5 freely rotates with the drum 29 passes over the slide roll H ofthe lever 5 and. brings the latter back to initial position. Then thespring l2 draws the stop lever 8 into normal position, so that the lever5 is secured by the nose to of the lever ii and the pin 5a. The lever'iiremains in normal position until the process described is repeated. i

What I claim and desire to secure by Letters Patent of the United Statesis:

1. In a rotary duplicator for printing on sheets a device forcontrolling the change of the form after a predetermined number ofcopies, comprising a rotatable printing drum, means for automaticallychanging the form, a movable rack, a rider adjustable on said rack, astop lever operatively connected with the means for changing the form,and a control projection connected with said drum and being capable torotate with the same, the said control projection being arranged so asto displace said rack step by step at each rotation of said drum untilthe rider adjustable on the rack releases by means of said stop leverthe means for automatically changing the form.

2. In a rotary duplicator for printing on sheets a device forcontrolling the change of the form after a predetermined number oicopies, comprising a rotatable printing drum, means for automaticallychanging the form, a movable rack, a rider adjustable on said rack, alever controlling the means for changing the form, a stop lever engagingthe said controlling lever, spring means secured to one'end of saidrack, a pawl locking the rack, a rod pivotally connected with the saidpawl and the said controlling lever, and a control tooth connected withthe said drum and capable to rotate with the same, the said controltooth being arranged so as to displace said rack step by step at ,eachrotation of said drum until the said rider releases by means of saidstop lever the-lever controlling the means for changing the form,whereas the said pawl, rod and controlling lever being arranged andinterconnected so that at the motion of the stop lever by therider-releasing the controlling lever the said pawl is lifted out of therack and the latter is returned to zero position by the said springmeans.

3. In a rotary duplicating machine for printing on sheets a device forautomatically controlling the change of the form after a predeterminednumber of copies, comprising a machine fram Y supported by a pin i5arranged on the lever 5. a printing drum rotatably mounted in the ma-.

chine frame, means for automatically changing the form, a longitudinallyslidable rack, a rider adjustable on said rack, a spring secured to oneend of the rack, a pawl locking the rack, a lever controlling the meansfor changing the form, a two-armed stop lever disposed in the machineframe, one arm of the said stop lever being fitted with a nose whereasthe other arm of the stop lever is positioned in the path of the rider,a pin on the said controlling lever adapted to engage the said nose ofthe stop lever, a rod pivotally connected with the said controllinglever and the said pawl, and a control tooth connected with the saiddrum and adapted to rotate with the same, the said control tooth beingarranged so as to displace said rack step by step at each rotation ofsaid drum until the said rider releases by means of said stop lever thelever controlling the means for changing the form, whereas the saidpawl, rod and controlling lever being arranged and interconnected sothat at the motion of the stop lever by the rider releasing thecontrolling lever the said pawl is lifted out of the rack and the latteris returned to zero position by the said spring.

i. In a rotary duplicating machine for printing on sheets a device forautomatically controlling the change of the form after a predeterminednumber of copies, comprising a machine frame, a printing drum rotatablymounted in the machine frame, means for automatically changing the form,a longitudinally slidable rack, a rider adjustable on said rack, aspring secured to one end of the rack, a pawl locking the rack, a levercontrolling the means for changing the form, a two-armed stop leverdisposed in the machine frame, one arm of the said stop lever beingfitted with a nose whereas the other arm of the stop lever is positionedin the path of the rider, a pin on the said controlling lever adapted toengage the said nose of the stop lever, a spring secured to the stoplever for holding the nose of the same in engagement with the said pinof the controlling lever, a rod pivotally connected with the saidcontrolling lever and the said pawl, a control cam connected to the saiddrum and adapted to rotate with the same, a slide roll mounted on thesaid controlling lever and adapted to engage with the said control cam,and a control tooth rotatable with the said drum, the said control toothbeing arranged so as to displace said rack step by step at each rotationof said drum until the said rider releases by meansof said stop leverthe lever controlling the means for changing the form, whereas the saidpawl, rod and controlling lever being arranged and interconnected sothat at the motion of the stop lever by the rider releasing thecontrolling lever the said pawl is lifted out of the rack and the latteris returned to zero position by the said spring, while the controllinglever is brought again in its initial position by means of the saidcontrol cam and slide roll.

5. In a rotary duplicating machine for printing on sheets a device forautomatically controlling the change of the form after a predeterminednumber of copies, comprising a machine frame, a rotatable printing drummounted in the machine frame, a table for feeding the form pivotallymounted on the machine frame, a lever for controlling the change of theform being pivotally mounted on the said frame, a pin on the controllinglever for supporting the feeding table, spring means connected with thefeeding table for pressing the same down on thesupporting pin of thecontrolling lever so that when the latter is lowered the feeding tableapproaches the said drum, 9. rotatable shaft on the drum, grippers forholding the form, the said grippers being arranged on the said shaft andextending through the circumference of the drum; a lever arm secured onthe said shaft, a slide roll on the said lever arm, a carriage on themachine frame, a slide embedded in the said carriage and guided by thesame, a cam disc disposed on the slide, a pin arranged on the slide, anopening in the said controlling lever for engaging with the said pin ofthe slide so that the slide and its disc cam may be lifted together withthe controlling lever whereby the said cam disc is brought in the pathof the lever arm and slide roll so as to lift the same and the grippersand release the clamped form, noses on the said feeding table, pinsarranged on the drum adapted to engage with the said noses of thefeeding table when the latter is lowered so as to withdraw the feedingtable in the direction of rotation of the drum a longitudinally slidablerack, a rider adjustable on the rack, a spring secured to one end of therack, a pawl locking the rack, a two-armed stop lever disposed on themachine frame, one arm of the said stop lever being fitted with a nosewhereas I the other arm is positioned in the path of the rider, a pin onthe said controlling lever adapted to engage the said nose of the stoplever, a. spring secured to the stop lever for holding the nose of thesame in engagement with the said pin of the controlling lever, a rodpivotally connected with the said controlling lever and the said pawl, acontrol cam connected to the said drum and adaptedto rotate with thesame, a slide roll mounted on the said controlling lever and adapted toengage with the said control cam, and a control tooth rotatable with thesaid drum, the said control tooth being arranged so as to displace saidrack step by step at each rotation of said drum until the said riderreleases by means of said step lever the lever controlling the means forchanging the form, whereas the said pawl, rod and controlling leverbeing arranged and interconnected so that at the motion of thestop leverby the rider releasing the controlling lever the said pawl is lifted outof the rack-and the latter is returned to zero position by the saidspring, while the controlling lever is brought again in its initialposition by means of the said control cam and slide roll.

LEO KLUITMANN.

